Current measurement by lagrangian drifting buoys - Problems and potential
- 1 January 1977
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 3, 639-645
- https://doi.org/10.1109/oceans.1977.1154374
Abstract
This paper discusses the current use of drogued Lagrangian free drifting buoys in terms of the two main problems Which limit their utility - drogue Lagrangian effectiveness (i.e., slippage) and overall drogue survivability. Scale model test data of drogue drag coefficient and behavior are summarized for numerous drogue designs and shapes. The benefits of certain designs are discussed and estimates of drogue slippage as a function of error-inducing drag force are present ed for representative drogues. The measurement of the steady flow horizontal drag coefficient of a full seal window shade drogue is described and compared with the scale model value. The in-situ measurement of the vertical drag coefficient of two full-scale window shade drogues are summarized and estimates made of buoy-drogue vertical interaction forces and conditions for slack line. The results of a full scale, instrumented window shade drogue slippage test are described for the case of a window shade drogue suspended beneath a Nova University minibuoy. The resulting measurement of drogue dynamic behavior and slippage estimates are presented and discussed in relation to the mathematical correctability of current velocity estimates from drogued buoy trajectories.Keywords
This publication has 9 references indexed in Scilit:
- SOFAR floats for POLYMODEPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1977
- In - Line And Transverse Forces, On Cylinders In Oscillatory Flow At High Reynolds Numbers.Published by Society of Petroleum Engineers (SPE) ,1976
- Sea-Surface Drift CurrentsPublished by Society of Petroleum Engineers (SPE) ,1975
- The Effect of Wind and Surface Currents on DriftersJournal of Physical Oceanography, 1975
- Development of a meteorological and oceanographic drifting buoy systemPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1975
- Observing abyssal motions by tracking Swallow floats in the SOFAR channelDeep Sea Research and Oceanographic Abstracts, 1970
- A proposed spectral form for fully developed wind seas based on the similarity theory of S. A. KitaigorodskiiJournal of Geophysical Research, 1964
- Forces on cylinders and plates in an oscillating fluidJournal of Research of the National Bureau of Standards, 1958
- A neutral-buoyancy float for measuring deep currentsDeep Sea Research (1953), 1955